Method and system for realizing simultaneous imaging and detection based on coding array

Abstract

The invention relates to a method and a system for realizing simultaneous imaging and detection based on a coding array. The method comprises the following steps: giving an independent coded pulse signal to each radiation array element of a radar array; the independent coded pulse signals enable echo signals generated by target reflection to be separable in time, space or frequency; or the echo signals can be separated after being decoded; when the radar works, each radiation array element of the radar array transmits a respective coded pulse signal, and each radiation array element receives echo signals of the coded pulse signals transmitted by itself and other radiation array elements; collecting the echo signal received by each radiation array element, and decoding the echo signal; and performing imaging processing and signal detection processing according to the decoded echo signal, and obtaining a radar image and a moving target detection result at the same time. According to the invention, the system performance for simultaneously realizing radar imaging and detection is improved, and the imaging performance and the moving target detection performance can be flexibly adjusted.

Description

technical field [0001] The invention belongs to the technical field of radar, and in particular relates to a method and a system for realizing simultaneous imaging and detection based on a coding array. Background technique [0002] Radar is a radio remote sensing detection device that obtains target information by transmitting detection signals and receiving target reflection signals. It can detect stationary targets and moving targets, and can achieve radar high-resolution imaging through aperture synthesis technology. Target image information. [0003] In the existing technology, synthetic aperture radar or inverse synthetic aperture radar is usually used to achieve high-resolution imaging of targets. These two radars use pulse compression technology to improve range resolution, and use synthetic aperture or inverse synthetic aperture technology to improve azimuth resolution. . [0004] In the prior art, pulse Doppler radar or MTI radar is used to detect the moving targ...

AI Technical Summary

Problems solved by technology

However, when the two radars are fused at the same time, it is difficult to take into account the design requirements of the two systems at the same time. Synthetic aperture radar and MTI radar have different requirements in terms of signal waveform, signal bandwidth, signal accumulation method, and signal accumulation time. When these technologies are implemented on a radar at the same time, it is usually necessary to compromise the above parameters, resulting in the reduction of the system's spatial resolution performance, time resolution performance, detection range and other imaging or detection performance.

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